Quadrature signal generator for tuning phases of all of four...

Details Quadrature signal generator for tuning phases of all of four... Quadrature signal generator for tuning phases of all of four...

2008-07-08

2008-07-08

Chang, Joseph (Department: 2817)

Oscillators

Phase shift type

With r.c. ladder-type phase shift network

C331S045000

Reexamination Certificate

active

11344061

ABSTRACT:
A quadrature signal generator capable of phase-tuning with respect to all of four generated quadrature signals. The quadrature signal generator includes four phase tuning units each having two input terminals, one receiving a differential signal, the other being grounded, and changing a phase of the differential signal to thereby generate quadrature signals. Accordingly, it is possible to tune phases of all the four generated quadrature signals. It is also possible to prevent the amplitude of quadrature signals from being deviated from a reference value.

REFERENCES:
patent: 6226509 (2001-05-01), Mole et al.
patent: 6388543 (2002-05-01), Molnar et al.
patent: 6529100 (2003-03-01), Okanobu
patent: 6768364 (2004-07-01), Wang

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